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The questionnaire design was described in a 1986 paper [30] and the first research paper validating the questionnaire was published in 1990. [31] The FFQ was subsequently modified and a web version was created. [32] Pen-and-paper and web version, both available at cost. Cost is $2 per respondent for pen-and-paper version, with a minimum of $100.
NHANES findings are used to determine the prevalence of major diseases and risk factors for diseases. Information is used to assess nutritional status and its association with health promotion and disease prevention. NHANES findings are also the basis for national standards for such measurements as height, weight, and blood pressure.
Since the results of a 24-hour diet recall are not representative, it is not a good stand-alone method and should be utilized with other methods, such as food frequency questionnaires. [1] A 24-hour diet recall cannot account for day-to-day variation, and so should be administered multiple times to be useful. [ 3 ]
The National Health and Nutrition Examination Survey (NHANES) is NCHS's most in-depth and logistically complex survey, operating out of mobile examination centers that travel to randomly selected sites throughout the U.S. to assess the health and nutritional status of Americans.
Authorized by the National Health Survey Act of 1956, [3] the U.S. Public Health Service was tasked with implementing an annual survey to collect information on morbidities – physical or mental conditions related to any illness or injury – and medical service and medical facility utilization.
A basic questionnaire in Thai. A questionnaire is a research instrument that consists of a set of questions (or other types of prompts) for the purpose of gathering information from respondents through survey or statistical study. A research questionnaire is typically a mix of close-ended questions and open-ended questions.
Epi Info has been in development for over 20 years. The first version, Epi Info 1, was originally developed by Jeff Dean while he was in high school. [3] [4] It was an MS-DOS batch file on 5.25" floppy disks and released in 1985. [5]
FoodData Central is USDA's integrated data system that contains five types of data containing information on food and nutrient profiles: [6] Standard Reference, using earlier approaches to determining nutrient profiles of foods in the marketplace, provides a comprehensive list of values for nutrients and food components that are derived from calculations and analyses.